NiAl matrix high-temperature self-lubricating composite

Shengyu Zhu, Qinling Bi, Hairong Wu, Jun Yang, Weimin Liu

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

A high-temperature self-lubricating composite NiAl-Cr-Mo-CaF 2 was fabricated using the powder metallurgy technique, and the tribological behavior of the composite at a wide range of temperatures (room temperature to 1000 °C) was investigated. The results showed that the composite had a favorable friction coefficient of about 0.2 and an excellent wear resistance of about 1 9 10 -5 mm 3N -1m -1 at the high temperatures tested (800 and 1000 °C). The excellent self-lubricating performance was attributed to the formation of the glaze film on the worn surface consisting mainly of CaCrO 4 and CaMoO 4 as high-temperature solid lubricants.

Original languageEnglish
Pages (from-to)535-540
Number of pages6
JournalTribology Letters
Volume41
Issue number3
DOIs
StatePublished - Mar 2011
Externally publishedYes

Keywords

  • High temperature
  • NiAl matrix
  • Self-lubricating composite
  • Wear

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